Paw - 01/2024

Dimensioning Friwa

Mounting example FriwaMini

FriwaMicro

FriwaMini

FriwaMidi

FriwaMaxi

FriwaMidi

FriwaMaxi

FriwaMidi

FriwaMaxi

2x FriwaMidi

FriwaMaxi

2x FriwaMidi

FriwaMega

2x FriwaMidi

FriwaMega

2x FriwaMaxi

FriwaMega

2x FriwaMaxi

2x FriwaMega

2x FriwaMaxi

2x FriwaMega

Optional accessories - MB3.10

Modbus RTU module - item no. 1339002

Connection of a cascade to a BMS

The controller FC3.10 offers 2500 registers that

can be processed by means of the MB3.10

Communication status visible via LED codification

Modbus RTU protocol

Modbus specific parameters can be set at the

controller – high flexibility and possibility to adapt

to an existing BMS

Optional accessories - WiFi3.10

Internet Gateway module - item no. 1339003

For the connection of DHW modules to an Internet

platform with the controller FC3.10

System monitoring and parametrisation

Display of the activated functions and graphic

overview of the nominal values

E-mail notification in case of error messages

Display of the alarms history

Dimensioning Friwa

The performance of the Friwa primarily depends on the temperature in the buffer tank which delivers the energy to heat up the domestic hot water module.

The demand of domestic hot water depends on the

flow and the number of consumers. In larger apartment buildings, a certain statistic distribution of

withdrawals can be observed. The following table gives a general overview of the application range of the different Friwa modules.

Housing unit

Single-family house

(up to two showers)

Single-family house

(three or more showers)

Two-family house

100

70 °C / 60 °C / 10 °C

70 °C / 45 °C / 10 °C ***

60 °C / 50 °C / 10 °C ***

***A DHW temperature below 60 °C during operation does not comply with DVGW 551 (German association for gas and water).

The compliance with water quality standards must be observed.

70 °C / 60 °C / 10 °C

flow temperature 70 °C / Hot water temperature 60 °C / Cold water temperature 10 °C

The DHW demand of max. 12 l/min and the simultaneity factor according to DIN 4708 represent the basis of calculation.

01/2024 • Printed in Germany

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PAW GmbH & Co. KG • info@paw.eu • www.paw.eu